564 EEUBEN L. KAHN 



2. Straight wire inoculations are made from the lactose fer- 

 mentation tube showing gas, into the butt and on the slant of 

 Endo tubes. After incubation (1) B. coli produce typical or 

 semi-t5T)ical colonies on the slant and gas in the butt. (2) 

 Anaerobes neither grow on the slant nor produce gas in the 

 butt of these tubes. 



3. Employing the same medium, another procedure for the 

 differentiation of anaerobes is described in the text, wherein 

 plates are employed instead of tubes. 



REFERENCES 



Committee on Standard Methods of Water Analysis 1917 American Public 



Health Association, Boston. 

 Frost 1916 Am. J. Pub. Health., 6, 585. 

 Jones 1916 J. Bact... 1, 339. 

 Meyer 1918 J. Bact., 3, 9. 

 SiMONDS AND Kendall 1912 J. InJect. Dis., 11, 207. 



